The Phanteks Eclipse P500A is the objective winner of this comparison, securing more category victories across the evaluated specifications. Its most impactful advantage is the inclusion of fans, which provides a 100% improvement over the Lian Li O11 Vision. While the Lian Li O11 Vision offers a 33% advantage in 2.5" drive bay capacity, it falls behind the Phanteks Eclipse P500A in the majority of the measured technical fields.

Users prioritizing out-of-the-box cooling performance should choose the Phanteks Eclipse P500A, as it includes double the number of fans compared to its competitor. Conversely, the Lian Li O11 Vision is the better selection for builders who require additional storage mounting options, specifically for those who need to maximize their 2.5" drive capacity. Your final decision should depend on whether your build requires more integrated airflow hardware or increased storage flexibility.